Milestone Checklist Generator — Plus the Real WHO Motor Study

Pick your child's age, and the tool generates a general checklist of milestones across four domains — physical, language, cognitive, and social — for the closest standard developmental checkpoint age. The checklist reflects general pediatric developmental surveillance guidance, consistent with CDC and AAP milestone checkpoints, since these cover a broader set of domains than the World Health Organization's own published milestone research.

Yes, but in a narrower and more specific way than many people expect. As part of the WHO Multicentre Growth Reference Study, WHO conducted a dedicated Motor Development Study covering six specific gross motor milestones: sitting without support, hands-and-knees crawling, standing with assistance, walking with assistance, standing alone, and walking alone. WHO does not publish an equivalent comprehensive checklist covering language, cognitive, and social-emotional milestones across ages 0–5 — that broader kind of multi-domain checklist comes from bodies like the CDC and AAP.

The six milestones studied in the WHO Motor Development Study are: sitting without support, hands-and-knees crawling, standing with assistance, walking with assistance, standing alone, and walking alone. WHO reports these as "windows of achievement" — an age range within which most children reach each milestone — rather than a single expected age, and notes that hands-and-knees crawling is not achieved by every child, some of whom move to standing and walking by other means.

WHO's exact "windows of achievement" figures (the specific age range in months for each milestone) are published in detailed statistical tables rather than as simple text, and this tool intentionally avoids restating precise numbers it cannot directly verify from WHO's own data tables. For the exact figures, WHO's Motor Development Study materials are available at who.int.

Developmental milestones are skills and behaviours that most children develop within a general age range, spanning physical (motor), language (communication), cognitive (thinking and problem-solving), and social-emotional domains. They are educational guidelines, not strict deadlines every child must meet at an exact age — children develop at their own pace within wide normal ranges.

Yes. Development is individual, and reaching a milestone earlier or later than a general checklist does not automatically indicate a concern. A child developing early in one domain and later in another is also common. If a child has not reached a milestone well outside the typical range, or you have specific concerns, it's worth discussing with your pediatrician.

You can raise milestones at any routine checkup — this is expected and encouraged. Worth mentioning specifically: a loss of previously acquired skills at any age, no progress in a domain over several months, or if you have any specific concern regardless of whether it matches a general checklist. Early conversation with a professional is always appropriate.

Generally not — comparing individual children's milestone timing isn't a particularly useful measure, since children develop at genuinely different rates within wide normal ranges. A checklist reflects population-level patterns, not a competition or a guarantee for any individual child.

WHO's own Motor Development Study specifically notes that hands-and-knees crawling is not achieved by every child — some babies move from sitting directly to standing and walking without a traditional crawling phase, such as bottom-shuffling. It's tracked as one of the six studied milestones, but it isn't treated as a mandatory step every child must pass through.

No — this tool runs entirely in your browser and doesn't save, store, or send your inputs anywhere. If you want an ongoing, personal milestone record, Lunara's milestone tracker does that automatically.

Lunara's milestone tracker lets you log milestones as your child reaches them, covering physical, language, cognitive, and social development from birth through age 5, with educational context for each stage — a personal record over time rather than a one-off checklist. It's free to start.